I built a SIP trunk between a CUCM6 and SIPXECS server in our lab.
Everything in CUCM6 regarding SIP trunk is set to non-secure standard.
I can make phone calls from the phones registered to the sipxecs server to the
phones registered to CUCM6 server.
However, when I try the the other way around, the sipxecs server sends a 407
Proxy authentication required message back to CUCM6 and the call fails. I only
hear a fast busy signal on the phone which is registered to CUCM6.
On sipxecs, I set up the trunk as unmanaged gateway.
Any ideas on how to disable this 407 proxy authentication? Or any ideas on how
to configure CUCM to respond those requests from sipxecs properly?
Thanks
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